Automatic fire-alarm.



L. J. BRYANT & J. CASE.

AUTOMATIC FIRE ALARM.

APPLICATION FILED 1.53.19, 1913.

LJB rra nt Patented Dec. 2, 1913.

LESTER J'. BRYANT AND JAMIE CASE, OF BRADFORD, PENNSYLVANIA.

AUTOMATIC FIRE -ALABM.

Specification of Letters Patent.

Patented Dec. 2,1913.

Application filed March 19, 1913. Serial No. 755,462.

To all'whom it may concern Be it known that we, Lns'rnn J. BRYANT aiid JAMIE CASE, citizens of the United States, residing at Bradford, in the county of M'cKean and State of Pennsylvania, have invented certain new and useful Improvements in Automatic Fire-Alarms, of which the following is a specification, reference being had to the accompanying drawings,

This invention relates to new and useful improvements in automatic fire alarms and has for its object to provide an improved construction of this character designed to be placed in any desired location exposed to the dangers of a fire, whereby when 'a predetermined temperature has been reached, an alarm will be sounded.

A further object of the invention resides in providing a device which is simple and durable n construction, inexpensive to manufactureand one which will be very efficient and useful in operation.

With these and other objects in view, the invention consists in the novel features of construction, combination and arrangement of parts as will'be hereinafter referred to and more particularly pointed out in the specification and claim.

In the accompanying drawing forming a part of this application, Figure 1 is a plan view of the device with the cover removed and showing in diagram the electrical connections therewith. Fig. 2 is a front elevation of the device with the cover removed. 85 Fig. 3 is a plan view of the device showing the same in its effective operating position. Fig. 4 is a perspective view of the cover or top of the device; and Fig. 5 is an enlarged detail section through the device, showing one of the split rivets.

In describing our invention, we shall refer to the drawing in which similar reference characters designate corresponding parts throughout the several views and in which- 1 indicates a plate of any desired size and shape formed of wood fiber or other nonconductive material and extending across the upper face of said plate and disposed through a pair of openings 2 and 3 therein, is o wire 4, which leads to one contact post of an alarm 5 such as an electrical bell or the like. Also extending over the plate and through an additional pair of openings 6 and 7, in said plate, below the wire 1, is an additional wire 8 which leads to one pole of a battery 9, the other pole of said batterv designated as 11*.

is connected with the other contact post of the alarm 5 by means of a wire 10 and the free ends of the wires st and 8 are extended and adapted for engagement with other alarms (not shown) connected in parallel. The wires i and 8 are, however, held in position across the plate 1, by means of the split rivets 11 which are extended through the plate from the rear face thereof to receive said wires between the furcations of the same.

A continuous wire member 12 is provided and looped in its length as shown at 13 to provide a spring member, the same being mounted on'the top face of the plate 1 and having one arm thereof disposed through one of the split rivets through which the wire 8 is disposed, the latter split rivet being Other split rivets extending through the plate are designed to retain the spring wire 12 in position thereon and it will be seen that in view of the disposition of the wire 8 and one arm of the spring wire l2through the same split rivet, a contact between these wire members is had. The arm of the spring wire 12 continuing from the split rivet or post 11 is bent downwardly through a cut-away portion or slot 14 in the forward edge of the plate 1 and is bent upwardly and laterally as shown at 15, while the extreme free end of the same is bent to form a hook, as shown at 16. That portion of the wire member 12 continuing from the loop 13 in the opposite direction is adapted to be sprung upwardly for engagement with one of the split rivets designated as 11 through which the wire 4 extends. When this arm of the spring wire member contacts with the latter post or rivet 11, a

circuit is completed between the battery and bell,but we have provided a means for retaining this portion of the spring wire arm out of contact with said post 11". To this end, the arm referred to continuing fromthe 13 is bent to extend substantially parallel to the arm 12, as shown at 17, this latter arm being offset in its length as shown at 18, to be received in a cut-awe -v portion 19 in the forward edge of the plate 1. The forward end of this arm 17 on the offset portion 18 therein is bent upwardly as shown at 20. A closed link or the like 21 formed of celluloid or other inflammable substance is also provided and applied to the projecting portions of the arms 12 and 17 just beyond the forward edge of the plate 1. When 80 applied, the .arms 12 and 17 are brought nearer to one another, thereby spacing the cont acting arm of the continuous spring wire member from the contact post 11. When this closed link is broken, the arms will spring apart: and the circuit; will, obviously, be completed. it it should occur thatv the closed link 21 has been broken and it is desired to retain the circuit ineom 'ilete, the hook 1(3 oi the one arm may be engaged with the bent portion 20 of the other arm of this spring member so as to retain the contacting or circuit completing portion thereof out 01 engagen'ient with the contact post 11 We have also provided a cove 2 for the device which is adapted to be applied to the plate 1 and lit snugly thereon to cover the various o iierating parts and members 23 carried on the plate retain said cover in proper position thereon. No means is provided for securing this plate and parts carried thereby on the wall as the wires l and 8 are adapted to be held to the wall of a structure by the usual or any preferred means, and when drawn taut, will retain this device, which is extremely tight in weight, in position on said wall.

In practice, assuming that the device is set up for operation with the closed link 21 applied, should a tire occur in the place where this device is located, said link 21, which is formed of inflammable substance, will burn at a prt'edetermined temperature. Upon the burning of this link 21, the arms 12 and 17 will he obviously sprung apart, pern'iitting the contacting portion of the spring member to engage the contact post 11", thereby obviously completing the circuit between the. bell and battery. The alarm will then be sounded and indication given to occupants or others nearby that a tire is ragmg.

From the foregoing it will be seen that We have provided a simple, inexpensive and ctlieienti means for car ying out the objects of the invention and while we have particularly described the elements best adapted to perform the functions set forth, it is obvious that vm ions changes in term, proportion and, in the minor details of construction may be resorted to within the scope of the appended claim, without departing from the spirit or sacrificing any of the principles ot the invent ion.

llaving thus described this invention, what we claim is in an automatic tire alarm, a plate of nonconducting material, a pair of contact posts mounted thereon, a spring member also mounted on the plate and designed to provide a pair of arms, one of which is engaged with one of said contact posts and the other adapted for engagement with the othereontact post, angular extensions termed on said arms for projection beyond one edge 01? said. plate, fusible connecting means engaged with the angular extensions oil said arms to temporarily retain one arm out of engagement with the one contact post, and a hook formed on the extension of the other arm of the spring member adapted for engageinent with the extension of the second mentioned arm, whereby to retain the latter out of engagement with the second mentioned contact post, prior to the appli-ation of said t'usible. connecting means in position,

in testimony whereot' we hereunto our signatures in the pretence of two nesses.

- LES. 19R J. ,tiltYr'ti lT,

Jiittllfi fArjtC. \v'itnesses J. H. BIRD, t). rl ti-nrreuno.

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